//--------function to check the registration form
function validate_fields()
{
	
 	if (document.contact.textfield10.value == "")
	{
		alert ("Please enter your name.");
		document.contact.textfield10.focus();
		return false;
	}

	
	var str=document.contact.textfield23.value
	if (str=="")
	{
		alert ("Please enter an email address.");
		document.contact.textfield23.focus();
		return false;
	}
	else
	{
		var filter=/^([\w-]+(?:\.[\w-]+)*)@((?:[\w-]+\.)*\w[\w-]{0,66})\.([a-z]{2,6}(?:\.[a-z]{2})?)$/i
		if (!(filter.test(str) && str.length >= 6 && str.length <= 50))
		{
			alert("Please enter a valid email address. e.g user@domain.com)");
			document.contact.textfield23.focus();
			return false;
	    }
	}
	
	
	if (document.contact.textfield33.value == "")
	{
		alert ("Please enter your contact phone number.");
		document.contact.textfield33.focus();
		return false;
	}
	
	
	if (document.contact.textarea.value == "")
	{
		alert ("Please enter your comment.");
		document.contact.textarea.focus();
		return false;
	}

return true;
}